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inessss [21]
3 years ago
8

The diagram below shows a sandbox and the frame that

Mathematics
1 answer:
Vikentia [17]3 years ago
8 0

Answer:

The area of the frame is (8x+16)\ ft^{2}

Step-by-step explanation:

we know that

The area of the frame is equal to the area of the larger rectangle minus the area of the smaller rectangle

so

A=(x+5)(x+3)-(x+1)(x-1)\\A=(x^{2}+3x+5x+15)-(x^{2} -1)\\A= (x^{2}+8x+15)-(x^{2} -1)\\A=(8x+16)\ ft^{2}

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